Palladium-Catalyzed Fluorocarbonylation Using N-Formylsaccharin as CO Source: General Access to Carboxylic Acid Derivatives
摘要:
N-Formylsaccharin, an easily accessible crystalline compound, has been employed as an efficient CO source in Pd-catalyzed fluorocarbonylation of aryl halides to afford the corresponding acyl fluorides in high yields. The reactions use a near-stoichiometric amount of the CO source (1.2 equiv) and tolerate diverse functional groups. The acyl fluorides obtained could be readily transformed into various carboxylic acid derivatives such as carboxylic acid, esters, thioesters, and amides in a one-pot procedure.
N-Phenyl-4-hydroxy-2-quinolone-3-carboxamides as selective inhibitors of mutant H1047R phosphoinositide-3-kinase (PI3Kα)
作者:Dima A. Sabbah、Neka A. Simms、Wang Wang、Yuxiang Dong、Edward L. Ezell、Michael G. Brattain、Jonathan L. Vennerstrom、Haizhen A. Zhong
DOI:10.1016/j.bmc.2012.09.059
日期:2012.12
efforts to optimize the lead PI3Kαinhibitor N-benzyl 4-hydroxy-2-quinolone-3-carboxamide using structure-based design and molecular docking. We identified a series of N-phenyl 4-hydroxy-2-quinolone-3-carboxamides as selectiveinhibitors of mutantH1047R versus wild-type PI3Kα and we also showed that the cell growth inhibition by these compounds likely occurs by inhibiting the formation of pAKT and induction
A protocol for efficient N-alkylation of benzamides with alcohols in the presence of cobalt-nanocatalysts is described. Key to the success of this general methodology is the use of highly dispersed cobalt nanoparticles supported on carbon, which are obtained from the pyrolysis of cobalt(II) acetate and o-phenylenediamine as a ligand at suitable temperatures. The catalytic material shows a broad substrate
描述了在钴纳米催化剂存在下苯甲酰胺与醇的有效N-烷基化的方案。这种通用方法成功的关键是使用碳负载的高度分散的钴纳米颗粒,这些纳米颗粒是通过乙酸钴( II )和邻苯二胺作为配体在合适的温度下热解而获得的。该催化材料表现出广泛的底物范围和对官能团良好的耐受性。除了合成各种仲酰胺(> 45 种产品)外,该催化剂还可以转化更具挑战性的脂肪醇和酰胺,包括生物基酰胺和大分子酰胺。成功的回收和再利用强调了催化剂的实际适用性。
Expedient carbonylation of aryl halides in aqueous or neat condition
作者:Wei Jie Ang、Lee-Chiang Lo、Yulin Lam
DOI:10.1016/j.tet.2014.09.065
日期:2014.11
An expedient and versatile, microwave-assisted procedure for the carbonylation of aryl halides with boronic acids, alcohols or amines in water or under neat conditions has been developed. The reaction is catalyzed by fluorous, oxime-based palladacycle 1 that shows an excellent recyclable property and low levels of Pd leaching. To demonstrate the usefulness of the protocol, we applied it to the preparation of compounds of pharmaceutical interest, including a precursor of the reverse transcriptase inhibitor, niacin, benzocaine and butamben. (C) 2014 Elsevier Ltd. All rights reserved.
Iron Pentacarbonyl in Alkoxy- and Aminocarbonylation of Aromatic Halides
We have identified reaction conditions for a Heck-type carbonylation based on [Fe(CO)(5)]. Preliminary optimization of alkoxycarbonylation on 2-bromonaphthalene defined functioning composition of the reaction mixture which was then applied on a small set of (hetero)aromatic halides. Respective aminocarbonylation of these halides with different amines, including aniline and benzotriazole, was accomplished with reasonable results.